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Cheap flights from London Heathrow Airport to Klagenfurt from £104

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 15/6. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — KLU
10 Jul — 17 Jul1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to Klagenfurt

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Klagenfurt
Explore the most affordable flight options available from Heathrow to Klagenfurt. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 10 June 2026.

Mon 6/706:00
LHR
-
KLU
1 stop7h 00m
Austrian Airlines
Mon 20/715:00
KLU
-
LHR
1 stop7h 40m
Austrian Airlines
Deal found 8/6£215
Thu 18/606:00
LHR
-
KLU
1 stop7h 00m
Austrian Airlines
Wed 24/615:00
KLU
-
LHR
1 stop7h 40m
Austrian Airlines
Deal found 5/6£217
Sat 27/606:00
LHR
-
KLU
1 stop7h 00m
Austrian Airlines
Mon 29/618:40
KLU
-
LHR
1 stop14h 40m
Austrian Airlines
Deal found 6/6£218
Wed 9/909:05
LHR
-
KLU
1 stop3h 55m
Austrian Airlines
Sat 19/915:00
KLU
-
LHR
1 stop4h 40m
Austrian Airlines
Deal found 9/6£220
Wed 15/706:00
LHR
-
KLU
1 stop7h 00m
Austrian Airlines
Sat 25/715:00
KLU
-
LHR
1 stop4h 40m
Austrian Airlines
Deal found 10/6£221
Fri 11/906:00
LHR
-
KLU
1 stop7h 00m
Austrian Airlines
Fri 18/915:00
KLU
-
LHR
1 stop7h 40m
Austrian Airlines
Deal found 6/6£221
Sat 20/606:00
LHR
-
KLU
1 stop7h 00m
Austrian Airlines
Mon 22/615:30
KLU
-
LHR
1 stop7h 10m
Austrian Airlines
Deal found 5/6£222
Mon 21/1206:00
LHR
-
KLU
1 stop7h 00m
Austrian Airlines
Sat 26/1214:50
KLU
-
LHR
1 stop4h 50m
Austrian Airlines
Deal found 10/6£232
Sat 12/906:55
LHR
-
KLU
2 stops6h 05m
Multiple Airlines
Sat 19/915:00
KLU
-
LHR
1 stop18h 20m
Multiple Airlines
Deal found 6/6£233
Sun 9/806:00
LHR
-
KLU
1 stop6h 25m
Multiple Airlines
Sat 15/815:00
KLU
-
LHR
2 stops6h 45m
Multiple Airlines
Deal found 9/6£233

Find flight deals from Heathrow to Klagenfurt

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Klagenfurt (KLU). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 10 June 2026.

Round-trip from

£215

One-way from

£104

Popular in

November

Cheapest in

January

Average price

£159
6/7-20/7
  • 6/7-20/7
  • 4 total stops
  • 35h 15m total
  • London to Klagenfurt
Search Deals
15/6
  • 15/6
  • 2 total stops
  • 16h 50m total
  • London to Klagenfurt
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (£23 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease (£10 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to Klagenfurt that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 10 June 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Klagenfurt that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Mon 6/7

06:00-14:00

1 stop7h 00m

Klagenfurt

Mon 20/7

15:00-21:40

1 stop7h 40m

£215
Fastest return journey

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Wed 9/9

09:05-14:00

1 stop3h 55m

Klagenfurt

Sat 19/9

15:00-21:40

1 stop7h 40m

£220

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Wed 24/6

06:00-14:00

1 stop7h 00m

Klagenfurt

Sat 27/6

15:00-21:40

1 stop7h 40m

£220

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Sat 4/7

06:00-14:00

1 stop7h 00m

Klagenfurt

Sat 1/8

15:00-18:40

1 stop4h 40m

£220

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Wed 15/7

06:00-14:00

1 stop7h 00m

Klagenfurt

Sat 25/7

15:00-18:40

1 stop4h 40m

£221

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Fri 11/9

06:00-14:00

1 stop7h 00m

Klagenfurt

Fri 18/9

15:00-21:40

1 stop7h 40m

£221

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Mon 6/7

06:00-14:00

1 stop7h 00m

Klagenfurt

Mon 13/7

15:00-21:40

1 stop7h 40m

£221

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Wed 15/7

06:55-14:00

2 stops6h 05m

Klagenfurt

Wed 29/7

15:00-21:40

1 stop7h 40m

£236

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Fri 23/10

06:00-14:00

1 stop7h 00m

Klagenfurt

Mon 26/10

14:50-21:40

1 stop7h 50m

£236

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Sat 20/6

06:00-14:00

1 stop7h 00m

Klagenfurt

Tue 23/6

15:00-18:40

1 stop4h 40m

£242

Flights are sorted by cheapest return flights first.

Deals found on 10/6

Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3

Best time to book a flight from Heathrow to Klagenfurt

Have a flexible travel schedule? Discover the best time to fly to Klagenfurt from Heathrow with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Reviews of airlines servicing Klagenfurt

Get insights into the airlines that provide service to Klagenfurt. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Klagenfurt. Reviews last updated 10 June 2026.
Read reviews from past customers who have flown with Austrian Airlines from London Heathrow Airport to Klagenfurt. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Austrian Airlines
7.6
Good
929 reviews
Check prices

Boarding

7.6

Comfort

7.3

Food

6.8

Crew

8.1

Overall

7.6

Entertainment

6.8

Reviews

1 / 20
10.0
Excellent

KENNETH,Mar 2026

VIE - EWR

Everything was great, took off on time, arrived on time, boarding was smooth, food and movies were great.
Austrian Airlines
7.6
Good
929 reviews
Austrian Airlines
7.6
Good
929 reviews
Check prices

Boarding

7.6

Comfort

7.3

Food

6.8

Crew

8.1

Overall

7.6

Entertainment

6.8

Reviews

1 / 20
10.0
Excellent

KENNETH,Mar 2026

VIE - EWR

Everything was great, took off on time, arrived on time, boarding was smooth, food and movies were great.

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Klagenfurt. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Klagenfurt from London Heathrow?

    Klagenfurt (KLU) is the airport you will fly into if you book a flight from London Heathrow to Klagenfurt. You should not have trouble finding flights to Klagenfurt from London Heathrow; the airport handles an average of 0 inbound flights from London Heathrow per day. You should also have plenty of airline options to choose from since 1 airline has flights to the Klagenfurt airport from London Heathrow. It is only a 2.0 mi journey from Klagenfurt (KLU) to Klagenfurt’s city center.

  • How long is the flight from London Heathrow Airport to Klagenfurt?

    Airlines like Austrian Airlines fly from London Heathrow Airport to Klagenfurt in about 7h. The time it takes to get you to your destination can typically vary by up to . Airlines will cover a distance of 745 mi.

  • What is the cheapest airline to fly from London Heathrow Airport to Klagenfurt round-trip?

    Austrian Airlines, at £217, was found to be the cheapest airline from London Heathrow Airport to Klagenfurt..

  • Can I find deals for flights from Heathrow to Klagenfurt that include hotel bookings?

    Yes. In addition to deals on Heathrow to Klagenfurt flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to Klagenfurt?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Klagenfurt.

  • Can I find deals for business class flights from Heathrow to Klagenfurt?

    Yes. Cheapflights offers flight deals from Heathrow to Klagenfurt by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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Top airline flying from Heathrow to Klagenfurt

Discover the top airline that operate flights from Heathrow to Klagenfurt. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 10 June 2026.
AirlineCheapestAverageFlexibilityOn-time
Austrian AirlinesCheapest£217Average£287FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights

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How does Cheapflights help users find flights from Heathrow to Klagenfurt?

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Can Cheapflights find flights from Heathrow to Klagenfurt with no change fees?

Need flexible booking options for your flight to Klagenfurt from Heathrow? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Heathrow to Klagenfurt become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Klagenfurt from Heathrow today and book when prices fit your budget.

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